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Not A Subset of HTML entity ⊄
⊄ is the HTML entity for Not A Subset of ⊄ (U+2284). Copy the decimal ⊄ and hex ⊄ codes plus CSS, JavaScript, Python and URL escapes.
- Entity
⊄- Code point
- U+2284
- Unicode name
- NOT A SUBSET OF
- Block
- Mathematical Operators
- Category
- Math symbol (Sm)
- Since
- Unicode 1.1
- Defined in
- HTML 4.01 and HTML5
Codes to copy
| HTML named | ⊄Works in HTML; in XML only & < > " ' are predefined. | |
|---|---|---|
| HTML decimal | ⊄Works in HTML and XML. | |
| HTML hex | ⊄Works in HTML and XML. | |
| CSS | content: "\2284";In a stylesheet, for ::before and ::after. | |
| JavaScript | "\u2284"Also valid in JSON. | |
| Python | "\u2284"Python 3 string literal. | |
| Python by name | "\N{NOT A SUBSET OF}"Readable alternative using the Unicode name. | |
| URL | %E2%8A%84Percent-encoded UTF-8 bytes, for a path or query value. | |
| UTF-8 bytes | E2 8A 843 bytes. | |
| UTF-16 | 22841 code unit, which is what JavaScript length counts. |
When to use it
⊄ writes U+2284 (Not A Subset of), a maths symbol from the Unicode Mathematical Operators block, encoded since Unicode 1.1. For more than a symbol or two, MathML, supported in all major browsers since 2023, gives proper maths spacing and layout.
The name dates from HTML 4, so it works in every browser and in old email clients.
More maths operators
⊆Subset of or Equal to⊂Subset of⊇Superset of or Equal to⊁Does Not Succeed⊈Neither A Subset of Nor Equal to⊀Does Not Precede⊉Neither A Superset of Nor Equal to≿Succeeds or Equivalent to
All maths operators · Every HTML entity · Encode or decode text
Source: the WHATWG HTML Standard list of named character references and the Unicode Character Database (Unicode 18.0).